一些 = "some" or "a few"
https://resources.allsetlearning.com/chinese/grammar/Expressing_%22some%22_with_%22yixie%22
我买了一些吃的。
有的 = some (part of a larger whole)
To refer to just certain members of group, you can use 有的 (yǒude). This usage is normally translated as "some" in English. It is often used multiple times in one sentence to refer to different groups.
有的人喜欢打球，有的人喜欢看球。
https://resources.allsetlearning.com/chinese/grammar/Using_%22youde%22_to_mean_%22some%22
key: 一些，有的，有的，有的
又 is used in declarative sentences and describes the simple repetition of actions. This repeated action has already occurred once in the past.
S 又VO了
北京昨天下雨了，今天早上又下雨了。
再 is used to express something that has already happened and will happen again.
（S） (想/要)再 v # mw + noun
早上我喝了三杯咖啡，现在我想再喝一杯咖啡。
（S） (想/要)再 v # 次
我去年去了中国，今天寒假我想再去一次。
However, when there is 要，想，or 是，you should only use 又。
Subj. + 又 + 要/想/是 Verb + Obj.
昨天考试了，明天我们又要考试。
早上我喝了三杯咖啡，现在我又想喝一杯。
怎么又是你？(How come it's you again!)
昨天我背（bèi，to recite）课文，今天又是我背课文。
reference
https://resources.allsetlearning.com/chinese/grammar/Comparing_%22zai%22_and_%22you%22
